81467960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1$

素因数の和:253

約数の個数: 128

約数和(自身を含む): 221184000

約数和(自身を除く): 139716040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 56, 58, 70, 79, 116, 127, 140, 145, 158, 203, 232, 254, 280, 290, 316, 395, 406, 508, 553, 580, 632, 635, 790, 812, 889, 1015, 1016, 1106, 1160, 1270, 1580, 1624, 1778, 2030, 2212, 2291, 2540, 2765, 3160, 3556, 3683, 4060, 4424, 4445, 4582, 5080, 5530, 7112, 7366, 8120, 8890, 9164, 10033, 11060, 11455, 14732, 16037, 17780, 18328, 18415, 20066, 22120, 22910, 25781, 29464, 32074, 35560, 36830, 40132, 45820, 50165, 51562, 64148, 70231, 73660, 80185, 80264, 91640, 100330, 103124, 128296, 128905, 140462, 147320, 160370, 200660, 206248, 257810, 280924, 290957, 320740, 351155, 401320, 515620, 561848, 581914, 641480, 702310, 1031240, 1163828, 1404620, 1454785, 2036699, 2327656, 2809240, 2909570, 4073398, 5819140, 8146796, 10183495, 11638280, 16293592, 20366990, 40733980, 81467960]

約数ペア:

[(1, 81467960), (2, 40733980), (4, 20366990), (5, 16293592), (7, 11638280), (8, 10183495), (10, 8146796), (14, 5819140), (20, 4073398), (28, 2909570), (29, 2809240), (35, 2327656), (40, 2036699), (56, 1454785), (58, 1404620), (70, 1163828), (79, 1031240), (116, 702310), (127, 641480), (140, 581914), (145, 561848), (158, 515620), (203, 401320), (232, 351155), (254, 320740), (280, 290957), (290, 280924), (316, 257810), (395, 206248), (406, 200660), (508, 160370), (553, 147320), (580, 140462), (632, 128905), (635, 128296), (790, 103124), (812, 100330), (889, 91640), (1015, 80264), (1016, 80185), (1106, 73660), (1160, 70231), (1270, 64148), (1580, 51562), (1624, 50165), (1778, 45820), (2030, 40132), (2212, 36830), (2291, 35560), (2540, 32074), (2765, 29464), (3160, 25781), (3556, 22910), (3683, 22120), (4060, 20066), (4424, 18415), (4445, 18328), (4582, 17780), (5080, 16037), (5530, 14732), (7112, 11455), (7366, 11060), (8120, 10033), (8890, 9164)]